A Answers (2)
Stacy Wiegman, PharmD, Pharmacy, answeredWhen used properly, condoms are a very effective form of birth control. If you use condoms correctly every time you have intercourse, studies show that they prevent pregnancy from occurring 97% of the time. However, in the real world condoms are somewhat less effective, preventing pregnancy more like 80% to 90%. For maximum protection, a man should use a condom throughout intercourse and make sure it remains on his penis until he has withdrawn from the vagina. Some people worry that condoms will break during intercourse due to poor quality, but that happens rarely.
American Diabetes Association answered
The condom is 85–90% effective in preventing pregnancy. The condom is a thin sheath that is placed over the penis before intercourse and is a common form of birth control. It prevents the sperm from entering the woman’s vagina. When used correctly and along with a spermicide, The condom should be put on before intercourse and can be removed soon afterward. Condoms also help prevent the spread of several sexually transmitted diseases, including gonorrhea, chlamydia, and AIDS.